Question

why should we burn magnesium ribbon if mg forms already magneaium oxide before burning​

Answer 1

Answer:

we should burn mg ribbon because it forms mg oxide and to remove that we should burn

Answer 2

Answer:

Hi

here is your answer,

we should burn magnesium to produce it's oxide in larger quantities when compared to the amount of magnesium oxide found on the surface of the metal. the magnesium oxide on surface of the metal is just a protective outer covering to prevent further oxidation

if u have any doubts pls do ask in the comments